Cage-stud for snap fasteners



Allg 21, 1951 H. J. REITER CAGE-STUD FOR SNAP FAsTENERs Filed June 23, 1948 INVENTQR. BAHULD d HEUER W ATTDH EY Patented Aug. 21, 1951 UNrrloa PATE orales@ CAGE-STUD1F0R SNAP FA'STENER'S Harold .In` Reiter, Chicago, Iliff Application MJune 23, 1948,"Se`rial N o. `34,651

and it` is adapted .to :be::receivedfandrresiliently heldin 4a circulari sogckettformedein an :associated socket-part secured to another/"piece of material. Because of. the .resiliency of thercagej-.like structure ofthe cage-stud, a `rigid studis.;` arranged within the cagepart; to receivetlrefposte-rivet-and to.; reinforce and prevent-complete:coliapseoffthe -cagepart under external" pressures. Such .cagestud structure necessitates anr assemblyfof parts ing standpoint because of the high material. and

laborrcostsinvolved in Vthe fabrication and assembly of the three parts. It is objectionable in use because the free inneredgefof theV channel-ring disposed on the bottom face of theassembly lends itself to cutting and tearingA throughithesheet on which the cage-stud is mounted.- Also, the base flange offsuch a cagestud=hasl-four thicknesses-of material around itsfperipheral-margin thus making the cage-stud unnecessarily-:thick and increasing the over-all di-mensionsfof an'Y installationwhich obviously should be kept-'at a minimum.

It is therefore an object of thefinvention to provide a novelly fabricatedbage-stud Whichfovercomes Val-l Vof the known objectionablerffeatures present in cage-studs of the kindffabricatedprior toethe present invention.

Another object is to provide a two-piece cagestud of novel construction.

Another object is to provide a novel cage-stud having a smooth bottom face.

Another object of the invention is to provide a cage-stud embodying such novel features of construction as will greatly reduce material and lend itself to complete automatic assembly.

Another object is to provide a novel cage-stud having a base flange of minimum material thickness.

Other and further objects of the present inveny tion will be .apparent from the following ldescrip- .2 tion and claims, and are fillustratedzimthe? am.- companyingV drawingwhichx-showsffone -embod-iment and-the method of;fabrication.`v Othe'rfem'ibodiments ofthe invention; embodying vthe same principle, may be used, andv changes-may bemade as desired by *those* 'skilled-1in 'the/artpwithout departing from'v tlie spiritioff .the presentf invention and the purview ofthe appended claimszs.

In the drawing r' installation embodying `the Ifeaturesvof thevpres.- entV invention, showing thefmountin'g strip' irr section.`

Fig. 2 is a plan viewfofthecage-stud.

Fig. 3 is a vertical. central sectionalfview of.the cage-stud, mounted'.-

Fig. 4 is a central `sectionalviewf-oifa partially formed stud-bodyig Fig. 5 isa central sectionalview of thegstudfbody after 'additional formi-ng.:

Fig. 6 isva central sectional view-showing-,the stud-body andcage assembled; but unsecured.

Referring to ltheedrawing; y.the improved v`cage.- stud-includes-a circularsperipheral-ly kflanged studbody, generally:4 indicated at I I., 4andiaicage, genorally-indicated atl I2.` The.:stud-body. is fabricated from a circular vpiece of I `sheet material, preferably brass, `andfis. provided with.. an .f axial upstanding stud -I3` andan upstanding peripheral flange I4. -v In the-completed -fastener installation, the stud I3 receives :a post-rivettorbedescribed hereinafter consequently, it `is.` formed, `on..its\up per closed end with, an en1argedhea.d: l5,... The head..l5 preferably isformed-after the stud.]3 is.initially shaped, .asfshownin Fig. 4,;'bybump.- ing. or otherwise striking the endfof thestud; with a sui-tablevtcol. so as toshorten.its..over a1l1ength and, cause itscircular. wall,A at., the top,.to. bulge outwardly. The headed: stud isbestillustrated ,in Fig.. 5,. where it is. tobe. observed. that it. now hasa reduced neck ,portion I6' and Atheaxialenf ter I'I.- of. its end-isconcayed -slig1f1tly.,A Ifdesired, the neck,,portionv` of.Y the .stud may beengaged between rollers, and reduced. in ,diameter to. provide the enlarged head'. However, the bumping operation for enlarging the stud head and providing a reduced neck is desirable because of the presence of the circular flange I4, which may out their lengths radiating therefrom clrcumferentially. The fingers are bowed downwardly Fig.v 1 is-a side elevationalfviewof a-cagea-.stud

from the center area I8 to define a circumferentially broken circular cage wall 2 I, and their free ends then are flared outwardly radially in a common plane, as at 22. The cage I2, prefabricated as described hereinabove, then is nested over the headed stud I3, as shown in Fig. 6. It should be observed that the cage is of a size to t freely over and remain out of contact with the headed stud, and that its peripheral margin, dened by the radially flared end portions 22, rests upon the circular area 23 of the stud-body.

After the cage I2 has been nested over the headed stud, the upstanding peripheral ange I4 is rolled inwardly downwardly tightly over the end portions 22 to anchor the cage I2 in place. The diameter of the inner circular edge of the downturned flange I4 may be substantially the same as or slightly less than the outside diameter of the unsecured cage at the juncture between the cage wall 2I and the end portions 22.

-As a consequence, the lower portion of said cage wall is deflected inwardly radially slightly, thus insuring a downwardly inwardly tapered circular side wall suitable for frictional engagement and detachable retention in an associated socket part (not shown) In the absence of such dimensional requirements, the cage wall 2l may be tapered duringthe initial forming operation.

The completed cage-stud is mounted on a sheet or strip of material 25 by being placed against one face thereof, as shown in Fig. 3. A postn rivet, including a post 26 and acircular base flange 21, is arranged on the other face of the strip or sheet in axial alignment with the cagestud. Pressure then is applied to project the post 26 through the strip or sheet, which may or may not have been previously perforated, and into the stud I3. As continued pressure is applied, the

free end` of the post-rivet 26 is distorted and flared outwardly radially into tight clinching engagement with the inside surface of the enlarged stud-head I5. At this time, the circular base of the cage-stud and the circular base flange 2l of operations. For example, the cage and the studbody may be fabricated by separate forming machines and conveyed automatically to hoppers or guides for delivery to a machine for assembling the two parts automatically. Such automatic delivery and assembly of prior art three-piece cage-studs has been economically impossible because of the diiculty in coordinating and positioning the three parts necessary for their fabrication. Also, the present cage-stud has a base flange of minimum materia1 thicknesses and the bottom face of the base flange is smooth, as distinguished from the channel-ring type of stud, so that tearing or cutting of the mounting strip or sheet is avoided. Consequently, a fastener installation which includes a cage-stud of the kind disclosed herein is capable of longer and more satisfactory service because of its durable structure and because it is less likely to tear out of its mounting when subjected to the stresses and strains of ordinary use.

Although an exemplary embodiment of the device of the invention has been illustrated and described in detail, it should be understood that the invention is capable of modification in detail without departing from the spirit of the invention and the scope of the appended claims.

I claim:

l. A snap fastener cage-stud comprising a flat circular base having an upstanding axial stud, an inverted cup-shaped cage of resilient material nested over said stud, said cage having its side walls defined by circumferentially spaced ngers of substantially uniform width throughout their lengths extending downwardly from the center of the cage, the fingers being spaced from the axial stud and having their free terminal portions extending radially and seated on and terminating short of the periphery of the at circular base, and a peripheral flange integral with said circular base overlying said free terminal portions to retain the cup-shaped cage in place.

2. A snap fastener cage-stud comprising a nat circular base having an upstanding axial stud, an inverted cup-shaped cage of resilient material nested over said stud, said cage having its side walls defined by circumferentially spaced fingers of substantially uniform width throughout their lengths extending downwardly from the center of the cage, the 1in-gers being spaced from the axial stud and having their free terminal portions extending radially and seated on the fiat circular base and a peripheral flange integral with said circular base overlying said free terminal portions to retain the cup-Shaped cage in place.

HAROLD J. REITER.

REFERENCES CITED The following references are of record in the le of this patent:

UNITED STATES PATENTS Number Name Date 405,179 Raymond June 11, 1889 650,378 Dowse May 29, 1900 718,113 Finney Jan. 13, 1903 739,677 Hyde Sept. 22, 1903 739,762 Washburne Sept. 22, 1903 857,559 Kerngood June 18, 1907 1,373,076 Jaquiery Mar. 29, 1921 1,451,429 Lontz Apr. 10, 1923 l2,212,361 Arthur Aug. 20, 1940 

